AW: SS20 2.4 SMP, irregular boot freezes and swapon segfaults
Hi..
> I get the same drop in bogomips, but I did not get a slower system...
is the taskswitching and launching (sub)shells in the same speed like
your 2.2.20-smp kernel? On my sparc a single running task by itself
was fast but switching between 2 active tasks take neerby 1 sec pause.
(may be a spezial Problem on CPU's with BIG! caches like my 142MHz/1M)
On my 2.2.20-smp system switching is very much! faster.
>
> > This all seem to be compiler/bintools dependend (gcc 2.95 vs. egcs32)
> > and some People say, the 2.4.18 and up may be stable on not-ROSS-cpu's
> > and without smp.
>
> Did you try with egcs? I wonder if that is true...
yes... SuSE say, gcc 2.95.x on sparc is buggy and the only way to get a
well running 2.2.x Kernel is egcs32. But egcs isn't able to compile 2.4.x
ImhO gcc 2.95.x is not buggy and able to build a 2.2.x but i'm not sure
about the 2.4.x Kernel and gcc (code generation) and there are some
important dependicies not covered by Compiler versions.
startupcode/loader in silo and kernel alignment vs.
bintools Versions vs.
compiler versions vs.
Bootprom version (Sparc/Ross) and Number vs.
CPU Hardware Type of MMU/Core (cpu bugs ?) vs.
??? vs. something more i've forgotten to count up?
Take a look in arch dependend kernel source files an you know what i mean!
It will be a very difficult Task to hunt Bugs in this area... damn!
And without cpu-docu.... pfff...
>
> > IMHO it is a Problem nearby the Ross MMU or in managing the CPU-Cache.
> > Can someone post assembler language docu for Ross cpu's to my Adress?
> > I'll try to hunt the Bug but there is rare docu on the Web.
>
> I asked for this information on sparclinux@vger.kernel.org, but nobody
> answered... probably they did not like my mail ;)
> I will try to help if I can, but I'm a greenhorn concerning the kernel
> code... and sparcs.
Hm.. guys with sparcs AND linux are the minority in the mainstream
but guys with sparcs AND linux AND more then 1 ROSS cpu are the crazy part
of a minority in the mainstream... :-) :-) :-)
[Greetings to Propellerhead aldo :-)]
I'm a greenhorn too but who cares?
Rolf
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